Broken foundation cinder block

[austin]

I found a broken cinder block (i.e. a 3" hole horizontally from the outside to the inside of the house). It is the bottom block of the foundation just next to the garage door opening. I hadn't noticed it before because it was hidden by the door frame on the inside and by dirt on the outside. The hole has been filled with foam gap filler. How serious is this problem? What do I do now?

[HayZee518]

if the foam is flush with the surface dig it out some and put in a plug of hydraulic cement. Do the same inside